A GUI (Graphical User Interface) is a visual representation of an operating system (OS) that enables users to interact with the computer system through graphical elements such as icons, menus, windows, and buttons, instead of typing commands in a command line environment.
The GUI is a layer on top of the OS that provides an intuitive and user-friendly interface for users to interact with the underlying operating system and its functions. It simplifies the management of a computer system by making it easier to navigate through the various files and applications, perform tasks, and customize settings.
In summary, a GUI is an essential part of modern operating systems, as it helps to improve user productivity and enhance the user experience by providing an intuitive and interactive interface that simplifies the interaction with the computer system.